{"common":{"save":0,"post_id":"4795","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"8170","post_id":"4795","mon_id":"1158113","chapter_id":"1158128","question":"<p>Tính t\u1ed5ng <strong>S<\/strong> các ph\u1ea7n t\u1eed c\u1ee7a t\u1eadp h\u1ee3p sau:<\/p><p><strong>M = { x ∈ Z | -103 < x < 102 }<\/strong>.<\/p>","options":["S = 102","S = 0","S = -102"],"correct":"3","level":"3","hint":"<p>Tách riêng -102, các s\u1ed1 khác 0 còn l\u1ea1i c\u1ee7a t\u1eadp h\u1ee3p M chia thành t\u1eebng c\u1eb7p s\u1ed1 \u0111\u1ed1i nhau có t\u1ed5ng b\u1eb1ng 0.<\/p>","answer":"<p>Vì M = { x ∈ Z | -103 < x < 102 } nên M = { -102 ; -101 ; ... -1 ; 0 ; 1 ; ... ; 100 ; 101 }<\/p><p>Suy ra S = (-102) + (-101) + (-100) + ... + (-1) + 0 + 1 + ... + 100 + 101<\/p><p> S = [(-101) + 101] + [(-100) + 100] + ... + [(-1) + 1] + 0 + (-102)<\/p><p> S = 0 + 0 + ... + 0 + 0 - 102<\/p><p> S = <strong>-102<\/strong><\/p><p>V\u1eady \u0111áp án \u0111úng là <span style=\"color:#16a085;\"><strong>S = -102<\/strong><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"132","test":"3","date":"2021-10-03 13:06:47","option_type":"txt","len":0},{"id":"8172","post_id":"4795","mon_id":"1158113","chapter_id":"1158128","question":"<p>Tính m\u1ed9t cách h\u1ee3p lí<\/p><p>3332 - ( 2681 + 3232 - 2131)<\/p>","options":["-450","450","-650"],"correct":"1","level":"3","hint":"<p>M\u1edf ngo\u1eb7c và thay \u0111\u1ed5i v\u1ecb trí c\u1ee7a các s\u1ed1 h\u1ea1ng kèm theo d\u1ea5u c\u1ee7a chúng m\u1ed9t cách thích h\u1ee3p.<\/p>","answer":"<p>3332 - ( 2681 + 3232 - 2131)<\/p><p>= 3332 - 2681 - 3232 + 2131<\/p><p>= (3332 - 3232) + (2131 - 2681)<\/p><p>= 100 - 550<\/p><p>= -450<\/p><p>V\u1eady \u0111áp án \u0111úng là<span style=\"color:#16a085;\"><strong> -450<\/strong><\/span><\/p>","type":"choose","extra_type":"balloon","time":"0","user_id":"132","test":"1","date":"2021-10-03 13:13:14","option_type":"txt","len":0},{"id":"8174","post_id":"4795","mon_id":"1158113","chapter_id":"1158128","question":"<p>Tính giá tr\u1ecb c\u1ee7a bi\u1ec3u th\u1ee9c P t\u1ea1i x = -11, bi\u1ebft<\/p><p>P = (-9111) - (340 + x) - (-349)<\/p>","options":["P = -9109","P = -9091","P = 9091"],"correct":"2","level":"3","hint":"<p>Thay giá tr\u1ecb c\u1ee7a x v\u1ea3o bi\u1ec3u th\u1ee9c P r\u1ed3i tính m\u1ed9t cách h\u1ee3p lí.<\/p>","answer":"<p>T\u1ea1i x = -11 thì P = (-9111) - (340 + x) - (-349)<\/p><p>P = (-9111) - (340 - 11) - (-349)<\/p><p>P = -9111 - 340 + 11 + 349<\/p><p>P = (11 - 9111) + (349 - 340)<\/p><p>P = -9100 + 9<\/p><p>P = -9091<\/p><p>V\u1eady \u0111áp án \u0111úng là <span style=\"color:#16a085;\"><strong>P = -9091<\/strong><\/span><\/p>","type":"choose","extra_type":"shape2","time":"0","user_id":"132","test":"1","date":"2021-10-03 13:18:55","option_type":"txt","len":0}]}
